WO2001050655A1 - Format de signal dans un systeme de transmission amrc a porteuses multiples - Google Patents
Format de signal dans un systeme de transmission amrc a porteuses multiples Download PDFInfo
- Publication number
- WO2001050655A1 WO2001050655A1 PCT/JP2000/009315 JP0009315W WO0150655A1 WO 2001050655 A1 WO2001050655 A1 WO 2001050655A1 JP 0009315 W JP0009315 W JP 0009315W WO 0150655 A1 WO0150655 A1 WO 0150655A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pilot
- signal format
- pilot symbol
- signal
- transmission
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/692—Hybrid techniques using combinations of two or more spread spectrum techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0016—Time-frequency-code
- H04L5/0021—Time-frequency-code in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
Definitions
- the present invention relates to a signal format in a multicarrier CDMA transmission system, and more particularly, to a pilot symbol transmitted in a multicarrier CDMA transmission system, for estimating an information symbol and a transmission path state for each of a plurality of users.
- a signal format of the signal including Background art
- phase modulation method that transmits information at the carrier wave phase
- a method of identifying and judging information data by differentially encoding and placing information on the relative phase of the preceding and succeeding symbols and performing delay detection on the receiving side Is common.
- differential detection as described above, since transmission data is differentially encoded, a 1-bit error in the radio section becomes a 2-bit error in information data.
- SNR signal power to noise power ratio
- the absolute synchronous detection for discriminating the phase of the received signal by the absolute phase for each symbol has a highly efficient receiving characteristic, it is difficult to determine the received absolute phase in a Rayleigh fading environment.
- a pilot channel common to all users is provided with a code orthogonal to a spreading code of each user in a downlink.
- the signal is multiplexed and transmitted.
- the pilot channel and the information channel are separated by despreading, the fluctuation of the transmission path is estimated by using this pilot channel, and the information symbol is demodulated using the estimation result.
- a multicarrier CDMA transmission system information symbols are transmitted using a plurality of subcarriers, and the transmission path variation differs for each subcarrier. Also, since the transmission signal is spread in the subcarrier direction, it is necessary for the receiving side to estimate each subcarrier at the chip level before despreading. Therefore, the method for estimating the transmission path variation applied to the transmission system according to the direct spread system (DS-CDMA) such as IS-95 described above is directly applied to the multicarrier C DMA transmission system. Can not do.
- DS-CDMA direct spread system
- a direct-sequence (DS-CDMA) system such as IS-95
- DS-CDMA direct-sequence
- each user each mobile station
- the transmission path of the common channel and the transmission path for each user are required. Since they are different, the result of channel estimation on a common pilot channel cannot be applied to the channel for each user. Disclosure of the invention
- a general object of the present invention is to provide a new and useful signal format in a multicarrier CDMA transmission system that solves the above-mentioned problems of the prior art.
- a detailed object of the present invention is to provide a signal format that enables a transmission path estimation for each user in a multicarrier CDMA transmission system.
- An object of the present invention is to duplicate information symbols and arrange them on the frequency axis, multiply the duplicated information symbols by a spreading code on the frequency axis, and use a plurality of subcarriers having different frequencies to obtain information.
- a multicarrier CDMA transmission system that performs multiplex transmission
- the pilot symbol is used for each user. This is achieved by a signal format including a common pilot symbol for estimating a common transmission path and a user-specific individual pilot symbol communicating on a transmission path different from the above transmission path.
- the transmission path common to each user is a transmission path that can be commonly used by each user, and is, for example, a broadcast channel or a transmission path formed with the same antenna pattern as the broadcast channel.
- all or some of a plurality of subcarriers used for the signal transmission may be used as subcarriers when a pilot symbol is spread on a frequency axis. it can.
- the pilot symbols should be orthogonal on the frequency axis to be spread and the pilot symbol sequences should be orthogonal on the time axis. it can.
- a part of a plurality of subcarriers used for the signal transmission are allocated to pilot symbols in a frequency domain, and the pilot symbols are allocated.
- Common pilot symbols and individual pilot symbols are It is possible to insert a multiplexed symbol sequence using a spreading code in the axial direction.
- the spreading codes for the common pilot symbols and the individual pilot symbols are configured to be mutually orthogonal. be able to.
- FIG. 1 is a diagram showing a configuration example of a transmitter for transmitting a signal in a signal format according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing a specific configuration example of the pilot symbol insertion circuit.
- FIG. 3 is a diagram illustrating a first example of a signal format.
- FIG. 4 is a diagram illustrating a second example of the signal format.
- FIG. 5 is a diagram illustrating a third example of the signal format.
- FIG. 6 is a diagram illustrating a fourth example of the signal format.
- FIG. 7 is a diagram illustrating a configuration example of a spreading code for an individual pilot signal.
- FIG. 8 is a diagram showing a fifth example of the signal format.
- a transmitter for transmitting a signal in a signal format according to an embodiment of the present invention is configured, for example, as shown in FIG. This transmitter is provided in a base station in a multi-carrier CDMA mobile communication system.
- this transmitter has signal generation circuits 100 (1) to 100 (n) corresponding to each user (mobile station).
- Each signal generation circuit 100 (1) to 100 (n) generates a signal for each user, and information to be distributed to each user.
- (Speech, data, etc.) information source 11 transmission line encoder 12 for encoding information from information source 11 according to a predetermined algorithm, serial-parallel conversion circuit 13 for transmitting multiple symbols simultaneously
- a duplication circuit 14 for duplicating the signals (information symbols) from the serial-parallel conversion circuit 13 by the number of subcarriers used for spreading, and a spread code c corresponding to each user for each signal duplicated by the duplication circuit 14
- the product 15 (i) the product 15 (i).
- Each of the signal generation circuits 100 (1) to 100 ( ⁇ ) has a pilot symbol insertion circuit 20 corresponding to each user.
- the pilot symbol insertion circuit 20 inserts (or adds) a pilot symbol corresponding to each user to a signal (information symbol) from the transmission path encoding circuit 12. This pilot symbol is used to estimate the state (amplitude fluctuation, phase fluctuation) of the transmission path between each user (mobile station) and the base station.
- the pilot symbol insertion circuit 20 may be configured to insert (or add) a pilot symbol corresponding to each user to the output of the serial-parallel conversion circuit 13.
- each of the signal generation circuits 100 (1) to 100 (n) converts a spread signal obtained by multiplying an information symbol by a spreading code and a pilot symbol corresponding to each user into a subcarrier. It is output as a signal to each user for each frequency component of. Then, the signals for each frequency component output from each of the signal generation circuits 100 (1) to 100 (n) are multiplexed by the multiplexing unit 50.
- the multiplexing unit 50 includes a synthesizing unit 51 for synthesizing signals from the transmission signal generation circuits 100 (1) to 100 (n), and a time for performing time-frequency conversion of the signal synthesized by the synthesizing unit 51. It consists of a frequency conversion circuit (IFFT) 52.
- IFFT frequency conversion circuit
- the pilot symbol insertion circuit 20 in each of the above-described signal generation circuits 100 (1) to 100 (n) is configured, for example, as shown in FIG. That is, switches SW1 and SW2 and a pilot symbol generator 22 are provided for each user. For a user who transmits with an antenna pattern different from the broadcast channel using an adaptive array antenna or the like, switches SW1 and SW2 are switched so as to select pilot symbol generation unit 22. As a result, The user-specific pilot symbol from the pilot symbol generation unit 22 is inserted into the signal (information symbol) from the transmission data generation unit (information source 11, transmission path encoder 12). Or added).
- this transmitter has a common pilot symbol generator 21 in addition to the pilot symbol generator 22 corresponding to each user described above (omitted in FIG. 1).
- the common pilot symbol generation unit 21 is a common pilot symbol used for users transmitting in the same pattern as an antenna pattern used when transmitting a common channel or a broadcast channel to all users such as a broadcast channel. Generate a set symbol. For users using this common pilot symbol, switches SW 1 and SW 2 select a path that bypasses pilot symbol generation section 22 and transmit data generation section (information source 11, transmission path encoder The signal from 12) is supplied to the multiplexing unit 50 without inserting (or adding) a user-specific pilot symbol.
- the signal in which the common and dedicated pilot symbols and the information symbols are multiplexed as described above is processed by the guard interval input unit 53, the filter 54, and the amplifier 55, and the signal after the processing is processed by the antenna unit.
- Sent from knit 5 6 The antenna unit 56 has, for example, an adaptive array antenna, and can generate a beam pattern for each user (mobile station).
- pilot symbol group PS can be inserted only at the beginning of the frame immediately before the user data symbol (see Fig. 3 (a)) or inserted at the beginning and end of the frame before and after the user data symbol (Fig. 3 (b)), and periodic insertion within the frame (see FIG. 3 (c)), it is possible to use either format.
- pilot symbol length is 2N
- individual pilot symbols can be assigned to 2N users.
- a common pilot symbol and an individual pilot symbol precede a spread signal sequence of a symbol sequence in which data symbols of each user are multiplexed.
- Symbol sequences PS1 to PSk obtained by multiplexing the symbols are inserted.
- This example is characterized in that k out of n subcarriers are used to spread pilot symbols.
- Information symbols can be transmitted to subcarriers on which pilot symbols are not inserted.
- a common pilot symbol sequence CPS, a user-specific individual pilot symbol sequence UPS, and a spread signal sequence DS of a symbol sequence in which each user's data symbol is multiplexed are multiplexed.
- each pilot symbol has a structure spread in the frequency axis direction and the time axis direction.
- one symbol length of the information symbol DS is equivalent to one chip length of each pilot symbol / CPS and UPS, and that the pilot symbol can be extracted by multiplying the pilot pattern on the receiving side. Become.
- the spreading code configuration for the common and dedicated pilot signals is, for example, as shown in FIG.
- code sequences spreading each pilot symbol (common, # 1, # 2, # 3) in the frequency direction are orthogonal to each other.
- Sync with next symbol At time t2, the extension code is shifted by one chip. This operation is performed for the period of the pilot symbol.
- the pilot and the symbol are orthogonal to each other. It is possible to separate the series (common) and the individual pilot series (# 1, # 2, # 3) assigned to each user.
- each of the channels (broadcast channel (common), channel # 1, channel # 2, channel # 3) State estimation can be performed. Further, a fifth example of the frame configuration of the transmission signal including the common and individual pilot symbols and the information symbols will be described.
- every p carriers are used as pilot carriers dedicated to pilot symbols, and other carriers multiplex the data symbols of each user. This is used for the spread signal sequence.
- each pilot carrier a symbol sequence in which a common pilot and individual pilot symbols of each user are multiplexed in the time axis direction is transmitted.
- pilot sequence it is preferable to use a pilot pattern with a correlation as small as possible (for example, an orthogonal code).
- the period of the pilot pattern can be lengthened, and the cross-correlation of each pilot pattern can be easily reduced.
- the transmission path state for the subcarriers other than the pilot carrier can be obtained from the transmission path state estimated from the pilot carrier using, for example, an interpolation method.
- the state of the transmission path common to each user can be estimated based on the change (amplitude fluctuation and phase fluctuation) of the common pilot symbol, and the unique pilot symbol can be used by the user. Therefore, even if a transmission path unique to a user is formed by an adaptive array antenna or the like, the transmission path state for the user at the receiving side can be changed to a specific path by associating the above-mentioned specific pilot symbol with the user. It can be estimated based on the change of the mouth symbol. Therefore, in a multi-carrier CDMA transmission system, each user Even when a common transmission path such as a channel is used, or when an individual transmission path is used, transmission path estimation can be performed for each user.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA 2362418 CA2362418C (en) | 2000-01-05 | 2000-12-27 | Multi-carrier cdma transmission system signal format |
KR10-2001-7011179A KR100413723B1 (ko) | 2000-01-05 | 2000-12-27 | 다중반송파 cdma 전송시스템에서의 신호 포맷 |
KR1020047011948A KR100733015B1 (ko) | 1999-12-28 | 2000-12-27 | 경로탐색 방법 |
EP20000985944 EP1158709B1 (en) | 2000-01-05 | 2000-12-27 | Signal format in multi-carrier cdma transmission system |
US09/914,781 US7286508B2 (en) | 2000-01-05 | 2000-12-27 | Signal format in multi-carrier CDMA transmission system |
AU22278/01A AU755731B2 (en) | 2000-01-05 | 2000-12-27 | Signal format in multi-carrier CDMA transmission system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000/543 | 2000-01-05 | ||
JP2000000543A JP3522619B2 (ja) | 2000-01-05 | 2000-01-05 | マルチキャリアcdma伝送システムにおける送信機 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001050655A1 true WO2001050655A1 (fr) | 2001-07-12 |
Family
ID=18529878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/009315 WO2001050655A1 (fr) | 1999-12-28 | 2000-12-27 | Format de signal dans un systeme de transmission amrc a porteuses multiples |
Country Status (8)
Country | Link |
---|---|
US (1) | US7286508B2 (ja) |
EP (1) | EP1158709B1 (ja) |
JP (1) | JP3522619B2 (ja) |
KR (1) | KR100413723B1 (ja) |
CN (1) | CN1180552C (ja) |
AU (1) | AU755731B2 (ja) |
CA (1) | CA2362418C (ja) |
WO (1) | WO2001050655A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7864739B2 (en) | 2002-05-16 | 2011-01-04 | Ntt Docomo, Inc. | Transmitter for multi-carrier transmission and multi-carrier transmitting method |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2361247C (en) * | 2000-11-06 | 2008-10-07 | Ntt Docomo, Inc. | Transmitter, transmitting method, receiver, and receiving method for mc-cdma communication system |
US8290098B2 (en) * | 2001-03-30 | 2012-10-16 | Texas Instruments Incorporated | Closed loop multiple transmit, multiple receive antenna wireless communication system |
JP3676991B2 (ja) * | 2001-07-05 | 2005-07-27 | 松下電器産業株式会社 | 無線通信装置及び無線通信方法 |
US7548506B2 (en) * | 2001-10-17 | 2009-06-16 | Nortel Networks Limited | System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design |
US8204504B2 (en) * | 2001-10-26 | 2012-06-19 | Rockstar Bidco Llp | Wireless communications system and method |
DE60136393D1 (de) | 2001-11-28 | 2008-12-11 | Fujitsu Ltd | Orthogonal-frequenzmultiplexübertragungsverfahren |
CN100596044C (zh) * | 2002-01-10 | 2010-03-24 | 富士通株式会社 | Ofdm系统中的导频复用方法和ofdm接收方法 |
JP2003244054A (ja) | 2002-02-21 | 2003-08-29 | Ntt Docomo Inc | 送信制御装置及び送信制御方法 |
US7363057B2 (en) | 2002-04-03 | 2008-04-22 | Nec Corporation | Mobile communication system, mobile station, base station, communication path quality estimation method used for the same |
JPWO2003103328A1 (ja) * | 2002-05-31 | 2005-10-06 | 三菱電機株式会社 | 通信システム |
KR100456455B1 (ko) * | 2002-10-07 | 2004-11-09 | 한국전자통신연구원 | 다중 반송파 통신에서의 채널 전송 심벌 생성 시스템 및그 방법 |
KR100457188B1 (ko) | 2002-10-07 | 2004-11-16 | 한국전자통신연구원 | 확산 방식 전환이 가능한 적응형 다중반송파코드분할다중접속 장치 및 그 방법 |
US6928062B2 (en) * | 2002-10-29 | 2005-08-09 | Qualcomm, Incorporated | Uplink pilot and signaling transmission in wireless communication systems |
AU2003275773B2 (en) * | 2002-11-07 | 2008-06-12 | Dspace Pty Ltd | Pilot symbols in communication systems |
AU2002952566A0 (en) * | 2002-11-07 | 2002-11-21 | Dspace Pty Ltd | Pilot symbol patterns in communication systems |
EP1589684A4 (en) * | 2003-01-29 | 2008-12-10 | Mitsubishi Electric Corp | MULTI-RADIO COMMUNICATION SYSTEM, TRANSMIT AND RECEIVING DEVICE |
CN100578987C (zh) | 2003-04-24 | 2010-01-06 | 日本电气株式会社 | 用于估计使用代码扩频的无线电发射中的噪声和干扰功率的无线电发射机-接收机及无线电发射/接收方法 |
US6999467B2 (en) * | 2003-07-28 | 2006-02-14 | Motorola, Inc. | Method and apparatus for transmission and reception within an OFDM communication system |
JP4829953B2 (ja) * | 2003-09-26 | 2011-12-07 | 日本放送協会 | Ofdm伝送方式におけるキャリアの配置方法 |
KR100950668B1 (ko) * | 2003-09-30 | 2010-04-02 | 삼성전자주식회사 | 직교 주파수 분할 다중 접속 방식을 사용하는 통신 시스템에서 업링크 파일럿 신호 송수신 장치 및 방법 |
US7242722B2 (en) | 2003-10-17 | 2007-07-10 | Motorola, Inc. | Method and apparatus for transmission and reception within an OFDM communication system |
DE112004001837D2 (de) * | 2003-10-18 | 2006-06-08 | Univ Dresden Tech | Verfahren zur Synchronisation bei der Übertragung von OFDM-Signalen |
CN1914870B (zh) * | 2003-12-05 | 2010-10-13 | 高通股份有限公司 | 同时支持miso和mimo接收机的多天线系统 |
US7145940B2 (en) * | 2003-12-05 | 2006-12-05 | Qualcomm Incorporated | Pilot transmission schemes for a multi-antenna system |
US7397839B2 (en) | 2004-01-27 | 2008-07-08 | Ntt Docomo, Inc. | OFDM communication system and method |
KR100818774B1 (ko) | 2004-01-29 | 2008-04-03 | 포스데이타 주식회사 | 광대역 무선 통신 시스템에서 다중-반송파 및 직접 시퀀스확산 스펙트럼 신호를 중첩시키는 방법 및 장치 |
US7742533B2 (en) | 2004-03-12 | 2010-06-22 | Kabushiki Kaisha Toshiba | OFDM signal transmission method and apparatus |
US7830976B2 (en) * | 2004-07-16 | 2010-11-09 | Qualcomm Incorporated | Iterative channel and interference estimation with dedicated pilot tones for OFDMA |
US7372913B2 (en) * | 2004-07-22 | 2008-05-13 | Qualcomm Incorporated | Pilot tones in a multi-transmit OFDM system usable to capture transmitter diversity benefits |
CN100382465C (zh) * | 2004-10-21 | 2008-04-16 | 大唐移动通信设备有限公司 | 时分双工移动通信系统终端工作在副载波时的同步方法 |
CN100578953C (zh) * | 2004-11-08 | 2010-01-06 | 松下电器产业株式会社 | 无线发送装置和导频信号插入方法 |
WO2006075372A1 (ja) | 2005-01-13 | 2006-07-20 | Fujitsu Limited | 無線通信システム |
JP4515312B2 (ja) | 2005-03-31 | 2010-07-28 | 株式会社エヌ・ティ・ティ・ドコモ | 移動局、送信方法および移動無線通信システム |
ES2421782T3 (es) * | 2005-04-29 | 2013-09-05 | Sony Deutschland Gmbh | Dispositivo de transmisión, dispositivo de recepción y método de comunicación para un sistema de comunicaciones OFDM con nueva estructura del preámbulo |
EP1737176A1 (en) * | 2005-06-20 | 2006-12-27 | NTT DoCoMo, Inc. | Signalling for allocation of a communication link in a MIMO system |
EP1739907B1 (en) * | 2005-06-29 | 2015-01-07 | Apple Inc. | Digital communication method, transmitter and receiver, wherein the amount of pilot symbols is selected based on the demodulator type at the receiver side |
EP2790331B1 (en) * | 2005-08-24 | 2019-01-09 | Wi-Fi One, LLC | MIMO-OFDM transmission device and MIMO-OFDM transmission method |
CN1805318B (zh) * | 2005-08-24 | 2010-05-12 | 华为技术有限公司 | 一种上行时频资源的分配方法 |
CN1921360A (zh) * | 2005-08-28 | 2007-02-28 | 华为技术有限公司 | 一种上行时频资源的分配方法 |
KR100810231B1 (ko) * | 2005-09-28 | 2008-03-06 | 삼성전자주식회사 | 무선 통신 시스템에서 다중 안테나를 이용한 신호 송신방법 및 장치 |
WO2007049768A1 (ja) * | 2005-10-28 | 2007-05-03 | Sharp Kabushiki Kaisha | 送信機、通信システム及び送信方法 |
JP4979224B2 (ja) * | 2005-11-08 | 2012-07-18 | シャープ株式会社 | 受信装置、送信装置および通信方法 |
JP4841235B2 (ja) * | 2005-11-30 | 2011-12-21 | 富士通株式会社 | 無線基地局、無線通信方法及び無線通信システム |
EP1806892A1 (en) * | 2006-01-10 | 2007-07-11 | Alcatel Lucent | Method of separating signals in a cellular multicarrier telecommunication system |
JP4445474B2 (ja) * | 2006-01-16 | 2010-04-07 | 株式会社東芝 | Ofdm信号の送信方法、ofdm送信機及びofdm受信機 |
JP4704222B2 (ja) * | 2006-01-27 | 2011-06-15 | 富士通株式会社 | 無線通信システム |
KR100913089B1 (ko) | 2006-02-07 | 2009-08-21 | 엘지전자 주식회사 | 다중 반송파 시스템에 적용되는 파일럿 신호 전송 방법 |
EP1830534A1 (en) * | 2006-03-03 | 2007-09-05 | Alcatel Lucent | Active cancellation of inter-cell interference in a cellular wireless access system |
KR101055060B1 (ko) | 2006-12-22 | 2011-08-05 | 후지쯔 가부시끼가이샤 | 무선 통신 방법, 기지국 및 유저 단말기 |
CN102938745B (zh) * | 2006-12-22 | 2017-08-25 | 富士通株式会社 | 无线通信方法 |
CN103220113B (zh) * | 2006-12-22 | 2017-02-22 | 富士通株式会社 | 无线通信方法及基站和用户终端 |
KR100877750B1 (ko) * | 2006-12-27 | 2009-01-12 | 포스데이타 주식회사 | 직교주파수 분할 다중 접속 시스템의 파일럿 톤 생성 방법및 장치와 이를 이용한 채널추정 방법 및 장치 |
JP2007215242A (ja) * | 2007-05-08 | 2007-08-23 | Fujitsu Ltd | 直交周波数分割多重伝送方法 |
US8644853B2 (en) * | 2008-05-12 | 2014-02-04 | Qualcomm Incorporated | Providing base station almanac to mobile station |
CN101594175B (zh) * | 2008-05-27 | 2012-12-26 | 电信科学技术研究院 | 一种波束赋型传输的方法、系统及装置 |
EP2131540B1 (en) * | 2008-06-04 | 2013-09-18 | Sony Corporation | New frame structure for multi-carrier systems |
CN101729115A (zh) * | 2008-10-29 | 2010-06-09 | 华为技术有限公司 | 一种多天线发射方法、装置及系统 |
US20100178934A1 (en) * | 2009-01-13 | 2010-07-15 | Qualcomm Incorporated | Environment-specific measurement weighting in wireless positioning |
US8270517B2 (en) * | 2009-02-13 | 2012-09-18 | Qualcomm Incorporated | Method and apparatus for orthogonal pilot tone mapping in multiple-in and multiple-out (MIMO) and spatial division multiple access (SDMA) systems |
JP4955041B2 (ja) * | 2009-08-20 | 2012-06-20 | 株式会社エヌ・ティ・ティ・ドコモ | 基地局、受信方法、移動局、送信方法 |
US8665156B2 (en) | 2009-09-08 | 2014-03-04 | Qualcomm Incorporated | Position estimation assistance information for mobile station |
US8437772B2 (en) | 2009-09-15 | 2013-05-07 | Qualcomm Incorporated | Transmitter position integrity checking |
US11956046B2 (en) * | 2022-03-21 | 2024-04-09 | GM Global Technology Operations LLC | Occupant detection system for a vehicle including a multi-band transceiver |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996000471A1 (fr) * | 1994-06-23 | 1996-01-04 | Ntt Mobile Communications Network Inc. | Circuit de demodulation de type cdma et procede de demodulation associe |
JPH1028077A (ja) * | 1996-07-11 | 1998-01-27 | Takuro Sato | 通信装置 |
JPH11514827A (ja) * | 1996-09-05 | 1999-12-14 | ノキア テレコミュニカシオンス オサケ ユキチュア | 送信および受信方法並びに無線システム |
JP2000201134A (ja) * | 1999-01-06 | 2000-07-18 | Ntt Mobil Communication Network Inc | マルチキャリア/ds―cdma伝送方法および復調装置 |
Family Cites Families (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1252234A (en) | 1985-11-01 | 1989-04-04 | Alan F. Graves | Method of multiplexing digital signals |
US4763317A (en) * | 1985-12-13 | 1988-08-09 | American Telephone And Telegraph Company, At&T Bell Laboratories | Digital communication network architecture for providing universal information services |
US4736364A (en) * | 1986-03-12 | 1988-04-05 | American Telephone And Telegraph Company, At&T Bell Laboratories | Switching system control arrangements |
BE1000512A7 (nl) * | 1987-05-07 | 1989-01-10 | Bell Telephone Mfg | Schakelnetwerk. |
DE3742939A1 (de) * | 1987-12-18 | 1989-07-06 | Standard Elektrik Lorenz Ag | Verfahren zur hybriden paketvermittlung und einrichtungen hierzu |
US5058104A (en) * | 1988-07-26 | 1991-10-15 | Nec Corporation | Tdm demultiplexer with dedicated maintenance channels to indicate high-speed line faults to low speed circuits |
JP2878805B2 (ja) * | 1990-08-20 | 1999-04-05 | 株式会社東芝 | Atm交換機 |
US5168492A (en) * | 1991-04-11 | 1992-12-01 | Northern Telecom Limited | Rotating-access ATM-STM packet switch |
JP3227677B2 (ja) * | 1991-12-13 | 2001-11-12 | ソニー株式会社 | 記録媒体駆動装置 |
FR2694466B1 (fr) * | 1992-07-29 | 1994-09-02 | Cit Alcatel | Réseau de télécommunication réalisant séparément un traitement d'appel et un traitement de connexion. |
US5327421A (en) * | 1992-11-06 | 1994-07-05 | At&T Bell Laboratories | Apparatus for interfacing between telecommunications call signals and broadband signals |
US5345446A (en) * | 1992-11-06 | 1994-09-06 | At&T Bell Laboratories | Establishing telecommunications call paths in broadband communication networks |
US5365524A (en) * | 1992-11-06 | 1994-11-15 | At&T Bell Laboratories | Establishing telecommunications call paths between clustered switching entities |
US5345445A (en) * | 1992-11-06 | 1994-09-06 | At&T Bell Laboratories | Establishing telecommunications calls in a broadband network |
CA2124379C (en) * | 1993-06-25 | 1998-10-27 | Thomas F. La Porta | Distributed processing architecture for control of broadband and narrowband communications networks |
US5509010A (en) * | 1993-06-25 | 1996-04-16 | At&T Corp. | Communications signaling protocols |
US5452297A (en) * | 1993-12-20 | 1995-09-19 | At&T Corp. | Access switches for large ATM networks |
US5426636A (en) * | 1993-12-20 | 1995-06-20 | At&T Corp. | ATM distribution networks for narrow band communications |
US5422882A (en) * | 1993-12-20 | 1995-06-06 | At&T Corp. | ATM networks for narrow band communications |
US5428607A (en) * | 1993-12-20 | 1995-06-27 | At&T Corp. | Intra-switch communications in narrow band ATM networks |
US5485455A (en) * | 1994-01-28 | 1996-01-16 | Cabletron Systems, Inc. | Network having secure fast packet switching and guaranteed quality of service |
US6023474A (en) * | 1996-11-22 | 2000-02-08 | Sprint Communications C.O.L.P. | Broadband telecommunications system interface |
CZ286974B6 (en) * | 1994-05-05 | 2000-08-16 | Sprint Communications Co | Method and apparatus for control of signaling processing system |
US5703876A (en) * | 1994-05-05 | 1997-12-30 | Christie; Joseph Michael | ATM transport system |
US5920562A (en) * | 1996-11-22 | 1999-07-06 | Sprint Communications Co. L.P. | Systems and methods for providing enhanced services for telecommunication call |
US5991301A (en) * | 1994-05-05 | 1999-11-23 | Sprint Communications Co. L.P. | Broadband telecommunications system |
US6181703B1 (en) * | 1995-09-08 | 2001-01-30 | Sprint Communications Company L. P. | System for managing telecommunications |
JPH08125591A (ja) * | 1994-10-20 | 1996-05-17 | Fujitsu Ltd | エコーキャンセラシステム |
US5565932A (en) * | 1994-11-08 | 1996-10-15 | Zenith Electronics Corp. | AGC system with pilot using digital data reference |
SE9404121L (sv) * | 1994-11-29 | 1995-12-04 | Telia Ab | Metod för synkronisering av sändare och mottagare vid mobilt radiosystem |
US5530724A (en) * | 1994-11-29 | 1996-06-25 | At&T Corp. | Echo canceler with automatic enablement/disablement on a per-call basis |
US5623491A (en) * | 1995-03-21 | 1997-04-22 | Dsc Communications Corporation | Device for adapting narrowband voice traffic of a local access network to allow transmission over a broadband asynchronous transfer mode network |
JP2863993B2 (ja) * | 1995-06-22 | 1999-03-03 | 松下電器産業株式会社 | Cdma無線多重送信装置およびcdma無線多重伝送装置およびcdma無線受信装置およびcdma無線多重送信方法 |
US5940491A (en) * | 1996-02-29 | 1999-08-17 | Lucent Technologies Inc. | Control of telecommunications networks |
US5710769A (en) * | 1996-02-29 | 1998-01-20 | Lucent Technologies Inc. | Merging the functions of switching and cross connect in telecommunications networks |
JP2934185B2 (ja) | 1996-03-15 | 1999-08-16 | 松下電器産業株式会社 | Cdmaセルラ無線基地局装置および移動局装置および送信方法 |
US5802045A (en) * | 1996-04-30 | 1998-09-01 | Lucent Technologies Inc. | Method of using a narrowband server to provide service features to broadband subscribers |
US6002689A (en) * | 1996-11-22 | 1999-12-14 | Sprint Communications Co. L.P. | System and method for interfacing a local communication device |
JPH10173630A (ja) * | 1996-12-13 | 1998-06-26 | Nec Corp | Cdmaチップ同期回路 |
CN1207865C (zh) * | 1997-03-26 | 2005-06-22 | 西门子公司 | 经移动通信系统的无线电接口发送用户信号的数据符的方法和发送设备 |
JP3798549B2 (ja) * | 1998-03-18 | 2006-07-19 | 富士通株式会社 | 無線基地局のマルチビームアンテナシステム |
JPH11266180A (ja) * | 1998-03-18 | 1999-09-28 | Fujitsu Ltd | 無線基地局のアレーアンテナシステム |
JP3264259B2 (ja) * | 1998-12-10 | 2002-03-11 | 日本電気株式会社 | Cdma受信装置 |
US6937665B1 (en) * | 1999-04-19 | 2005-08-30 | Interuniversitaire Micron Elektronica Centrum | Method and apparatus for multi-user transmission |
US6728307B1 (en) * | 1999-09-13 | 2004-04-27 | Nokia Mobile Phones Ltd | Adaptive antenna transmit array with reduced CDMA pilot channel set |
US6947748B2 (en) * | 2000-12-15 | 2005-09-20 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US6999467B2 (en) * | 2003-07-28 | 2006-02-14 | Motorola, Inc. | Method and apparatus for transmission and reception within an OFDM communication system |
-
2000
- 2000-01-05 JP JP2000000543A patent/JP3522619B2/ja not_active Expired - Lifetime
- 2000-12-27 EP EP20000985944 patent/EP1158709B1/en not_active Expired - Lifetime
- 2000-12-27 WO PCT/JP2000/009315 patent/WO2001050655A1/ja active IP Right Grant
- 2000-12-27 AU AU22278/01A patent/AU755731B2/en not_active Ceased
- 2000-12-27 CN CNB008046867A patent/CN1180552C/zh not_active Expired - Fee Related
- 2000-12-27 KR KR10-2001-7011179A patent/KR100413723B1/ko active IP Right Grant
- 2000-12-27 US US09/914,781 patent/US7286508B2/en not_active Expired - Fee Related
- 2000-12-27 CA CA 2362418 patent/CA2362418C/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996000471A1 (fr) * | 1994-06-23 | 1996-01-04 | Ntt Mobile Communications Network Inc. | Circuit de demodulation de type cdma et procede de demodulation associe |
JPH1028077A (ja) * | 1996-07-11 | 1998-01-27 | Takuro Sato | 通信装置 |
JPH11514827A (ja) * | 1996-09-05 | 1999-12-14 | ノキア テレコミュニカシオンス オサケ ユキチュア | 送信および受信方法並びに無線システム |
JP2000201134A (ja) * | 1999-01-06 | 2000-07-18 | Ntt Mobil Communication Network Inc | マルチキャリア/ds―cdma伝送方法および復調装置 |
Non-Patent Citations (2)
Title |
---|
HIROYUKI ARATA ET AL.: "Agari link broad band musen packet densou ni okeru SC/DS-CDMA, MC/DS-CDMA, MC-CDMA houshiki no tokusei hikaku", TECHNICAL RESEARCH REPORT, RCS99-131, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, 15 October 1999 (1999-10-15), XP002944733 * |
YUKIKO HANADA ET AL.: "OFDM/DS-CDMA packet musen access ni oekru douki kenha", PROCEEDINGS B-5-18 OF GENERAL MEETING, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, 8 March 1999 (1999-03-08), XP002944732 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7864739B2 (en) | 2002-05-16 | 2011-01-04 | Ntt Docomo, Inc. | Transmitter for multi-carrier transmission and multi-carrier transmitting method |
Also Published As
Publication number | Publication date |
---|---|
US7286508B2 (en) | 2007-10-23 |
KR100413723B1 (ko) | 2004-01-03 |
EP1158709A1 (en) | 2001-11-28 |
US20020136176A1 (en) | 2002-09-26 |
CA2362418A1 (en) | 2001-07-12 |
CN1343408A (zh) | 2002-04-03 |
JP2001197037A (ja) | 2001-07-19 |
KR20010110459A (ko) | 2001-12-13 |
AU2227801A (en) | 2001-07-16 |
AU755731B2 (en) | 2002-12-19 |
EP1158709B1 (en) | 2012-01-11 |
EP1158709A4 (en) | 2006-01-11 |
JP3522619B2 (ja) | 2004-04-26 |
CA2362418C (en) | 2010-08-17 |
CN1180552C (zh) | 2004-12-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2001050655A1 (fr) | Format de signal dans un systeme de transmission amrc a porteuses multiples | |
EP2790340B1 (en) | Transmitter, receiver, mobile communication system and synchronization channel | |
JP4009641B2 (ja) | 通信システム、通信方法、送信装置、受信装置及び制御プログラム | |
AU2004307128B8 (en) | Local and wide-area transmissions in a wireless broadcast network | |
KR100918764B1 (ko) | 다수개의 송신 안테나들을 사용하는 직교 주파수 분할 다중 통신시스템에서 프리앰블 시퀀스 송수신 장치 및 방법 | |
JP2012239186A (ja) | 単一搬送波周波数分割多元接続システムにおける符号分割多重化 | |
EA017731B1 (ru) | Устройство генерации данных, способ генерации данных и базовая станция | |
JP2000332724A (ja) | マルチキャリア伝送システムおよびマルチキャリア変調方法 | |
JPWO2007122828A1 (ja) | パイロット信号伝送方法および無線通信装置 | |
WO2003003634A1 (fr) | Emetteur multiporteuse, recepteur multiporteuse et procede de communication multiporteuse sans fil | |
EP1204224B1 (en) | Mobile communication system in multi-carrier CDMA scheme using short code and long code | |
JP2000201134A (ja) | マルチキャリア/ds―cdma伝送方法および復調装置 | |
CN1883137B (zh) | 在无线多载波通信系统中接收宽带导频的方法和装置 | |
JP4733213B2 (ja) | 送信装置および送信方法 | |
JP2006074493A (ja) | マルチキャリア送信装置、マルチキャリア受信装置及び同期検出方法 | |
RU2414073C2 (ru) | Передатчик, приемник, система мобильной связи и способ передачи канала синхронизации | |
JP2005057610A (ja) | マルチキャリア通信装置およびマルチキャリア通信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 00804686.7 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CA CN KR SG US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020017011179 Country of ref document: KR |
|
ENP | Entry into the national phase |
Ref document number: 2362418 Country of ref document: CA Ref document number: 2362418 Country of ref document: CA Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09914781 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 22278/01 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2000985944 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2000985944 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020017011179 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 22278/01 Country of ref document: AU |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020017011179 Country of ref document: KR |